Metrohm 850 Professional IC Cation - Gradient - Manual (Page 43)

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3 Installation
850 Professional IC Cation – HP-Gradient
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3 Clamping screw 4 Eluent aspiration tubing
Eluent aspiration tubing 6.1834.080 or
6.1834.090.
5 Backup ring
1 Connecting coupling
Fasten the coupling (18-2) with a pressure screw (18-1) on the pump
head input capillary (17-7).
2 Connecting eluent aspiration tubing
Caution
The clamping screws must be tightened carefully. To tighten, grip
the coupling (18-2) with the 6.2739.000 key and grip the clamp-
ing screw (18-3) with the 6.2621.050 wrench.
￭ Plug the eluent aspiration tubing (18-4) into the coupling (18-2).
￭ Tighten clamping screw (18-3).
3.10.2 Deaerating the high pressure pump
The high pressure pump will only operate perfectly if the pump head con-
tains no more air bubbles. Therefore it must be deaerated during initial
start-up and after every change of eluent.
Caution
The high pressure pump must not be deaerated before the initial start-
up (see Chapter 4.1, page 50).
Deaerate the high pressure pump as follows (see Figure 19, page 36):
Deaerating the high pressure pump
The instrument must be connected to the PC and switched on to deaerate
the high pressure pump.